Sofa



FIG. 1 is a front view of a sofa according to an embodiment of the invention.

FIG. 2 is an overhead view of a sofa according to an embodiment of the invention.

FIG. 3 is a rear view of a sofa according to an embodiment of the invention; and,

FIG. 4 is an end view of a sofa according to an embodiment of the invention, the view from the opposite end being a mirror-image thereof.

The pillow shown in dashed lines forms no part of the claimed design. 

We claim the ornamental design for sofa, as shown and described. 